Fan-belt tightener



Sept. 9 1924. 3,508,081

T. H. BEAN FAN BELT TIGHTENER Filed Nov. 17'. 1923 85 the drawings Patented Sept.9,1924.

Mr H. snare, or

stars" arranmno, mas.

FAN-BEER TIGHTENEE.

Application filed November 17, 1923. Serial No. 675,808.

To all whom it may concern:

Be it known that I, TAT H. BEAN, residing at Amarillo, Texas, a citizenof the United States, have invented certain new.

- and usefulIm rovements in Fan-Belt Tighteners, of whic the following is a speci cation.

The object of my invention is to provide an automatically actin belt adjuster or tightener for the fan driving belts of Ford cars and in achieving my object I have done so by a device that consists of a single. spring member which can be applied to the car without any alteration or modification whatevercan be very easily and cheaply manufacture and easily installed; will serve as a safety device to revent damage to the fan or to the hood of t e car should the belt break; will prevent the belt slipping on the'one hand or being overstrained on the other; and by adding to the efficiency of the fan will keep the engine cooler and economize in oil and gasoline. My invention consists in whatever is described by or is'included within the terms or scope of the appended claims In the accompanying drawings Fig. 1 is a perspective view of enough of the engine of a Ford to illustrate my inventionv Fig; 2 is a detail-view in perspective of the tension device.

Fig. 3 is a detailvihw in section on line' 33 of Fig. 1.

Referring in detail to what is shown in 1 0 desi case cover of a For car to a bolt, 11, on which is pivoted the arm, 12, which supports the fan belt ulley 13, which arm has a lag, 14, that is adapted to be enga d b a bolt 40 or a screw, 15, assinglthrou a t readed hole inthe lug, 1 on t e era case cover to adjust the tension of the belt by movin said arm, the construction in all-these re a being the typical or characteristic 0rd construction a'nd'none of which need to be altered or modifiedin any res act for the application of m invention an some of which I make use 0 in applying myv device. My

invention comprises a coil, 16, of one or more ates the front, crank.-

turns of heavy sprin wire which .fits over the hub and wheel 0 the arm pivoting bolt and which coil has one terminal that extends tangentially from the outer side of the coil to provide an arm, 21,-which extends alongside the pulley supporting arm, 12, and hooks thereunder so that it tends by the actionof the coil to swing said arm in the a direction to tighten the belt-which obviously is done by a gentle, yielding force, while its other terminal extends in the opposite direc- .tion and is bent intoa half turn or loop, 18,

to straddle the usual tension adjustin bolt or screw, 15, above mentioned and to ie between the lug, 17, and the lock'nut, 19, on

said bolt or screw and thereby provide the reaction a ainst' which the s ring works. One arm 0 the loop is extend I towards the swinging arm 12 and has a lateral'ext/ension' 20, that extends crosswise of said arm at such a point that should the fan belt break such extension and be arrested thereby and and the arm swing'upward it will engage thus-damage to either fan or hood will be prevented. The sto thus provided is more or less resilient an thus the force of the blow of the arm will be cushioned.

What I claim is: I

1. The combination with the swinging fan pulley arm of a Ford en ine and the arm adjustin screw thereof of a spring secured in'place said screw and having means to eng e said arm, the spring having a stop mem er' to limit the movement of said arm in the direction which the spring tends to move it. 3

'2. A tancbelt adjuster for. Fords comprising a spring having a coil adapted'to be laced concentric with the spring arm of the It adjuster and oppositely extending terminals' one for engagement with sai arm and the other, having a loop for clamping engagement of the usual arm ad usting de-.-

free end in position r engagement by said arm. v j In testimony whereof -I hereunto aflix my signature.-

TAT/H. :BEAN. 

